f9k9 wrote:... I gingerly asked a muffler shop if, they would remove my precat and weld in a straight pipe. They agreed to do it after telling me it was covered under warranty and much discussion.
While it is true that the emissions system parts are covered under warranty for at least 8 years or 80k miles, I think you are better off without the precat.
There really is no need for it. Another one of those good ideas that just didn't work very well.
"Speed doesn't kill, suddenly becoming stationary does." - Richard Hammond
"Speed is just a matter of Money - How fast do YOU want to go?"-Mechanic from Mad Max-
If at first you don't succeed - Don't take up Skydiving! - ThunderIIKE7CSK
f9k9 wrote:If, my precat turns out to be clogged, then the removal will solve my overheating and bad gas consumption problems.
You'll be glad you did. I was. Mine was only 30-40% plugged on visual inspection and I can't believe what a difference it made in performance and mileage.
2001 CC LS, pewter, stock, 4.3,Wait4meperformance, CFM throttle blade, Helix throttle body spacer, 4spd auto, 3button electric 4x4 shift, heavy duty factory suspension, Bilsteins, 1" rear wheel spacers, skid plates.
HenryJ wrote:...........................While it is true that the emissions system parts are covered under warranty for at least 8 years or 80k miles, I think you are better off without the precat..........
Yeah, I am quite familiar with the emissions warranty and I know what a traumatic experience it would be to get a dealer to actually look at the precat. Even though I am in tight with a service manager it would be a hassle. I'll eliminate it and then see where I am at concerning engine temps and mileage.
Brule, the improved VSC will make rigging the fans up to get home a little more difficult but, very doable. I am curious on why they are still marketing both models. I can take photos of the failed unit's parts if, you deem it worthwhile.
roadrunner wrote:...........You'll be glad you did. I was. Mine was only 30-40% plugged on visual inspection and I can't believe what a difference it made in performance and mileage.
Fingers are crossed. It will be a long hot and expensive journey to Moab if, I do not solve this issue.
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Welll, just had the precat removed. The tech said that it had a couple of bad places but, advised it wasn't bad I'll try to post pics if, anyone thinks they can tell one way or the other. It has got to be a serious restriction of exhaust flow . The point of light in the pics are of the other end. They are the same size on both ends.
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I couldn't really tell but, I just drove it home (5 min) and parked it.
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Doesn't look bad to me either. I assume the cat looked good too?
"Speed doesn't kill, suddenly becoming stationary does." - Richard Hammond
"Speed is just a matter of Money - How fast do YOU want to go?"-Mechanic from Mad Max-
If at first you don't succeed - Don't take up Skydiving! - ThunderIIKE7CSK
HenryJ wrote:Doesn't look bad to me either. I assume the cat looked good too?
Well, I honestly couldn't look but, he tapped it several times without hearing any rattling. Those points of light observed through either end look pretty small to me but, I don't know what they should look like. Would I gain any info if I busted through one of the screens?
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The damage would have been visible. Melting and plugging.
Tapping and listening for rattling are signs for one that is really bad. Banging on them is a very crude method and really not very effective. A pressure test with the system hot is a much better indicator. Even a temperature comparison would be better.
We will say your cat was fine, as the precat looks decent.
"Speed doesn't kill, suddenly becoming stationary does." - Richard Hammond
"Speed is just a matter of Money - How fast do YOU want to go?"-Mechanic from Mad Max-
If at first you don't succeed - Don't take up Skydiving! - ThunderIIKE7CSK
I'll try to post pics if, anyone thinks they can tell one way or the other. It has got to be a serious restriction of exhaust flow . The point of light in the pics are of the other end. They are the same size on both ends.
